Measurement

We use measurement in our everyday life. Examples are; making comparisons of an object based on their sizes, comparing distances, comparing liquid volumes, comparing the weights of some food stuffs when we visit the market and among others. These ways of measurement do not give you an accurate answer, but will always give you an idea about the measurement.

Scientists use standard methods for measuring things, and they make their measurements using standard units. This method has been accepted by many countries thus making their findings accepted by many people. This way of measurement, will teach you different ways of measurement and their importance. Measurements are needed in our day to day activities.

Physical Quantities

These are properties of matter that can be measured. Examples are the volume of a liquid, the mass of a book, the length of a pen, the hotness of a friend, the time and among others. The size of an object does not always affect the weight of that object. The weight or mass is mostly based on the composition of the object.

Example; let’s use the weight or mass between a stone and a foam to explain why a stone can sink in a water but a foam floats on it.

Ans: a stone has more substances in it compared to the foam. The substances in it are called matter. The matter in the stone makes it heavier compared to the foam. This makes the stone sink in the water irrespective of its size and the foam to float.